<template>
  <div>
    <!-- 面包屑导航组件 -->
    <el-breadcrumb separator-class='el-icon-arrow-right'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter='20'>
        <el-col :span='8'>
          <el-input placeholder='请输入内容' v-model='queryInfo.query' clearable @clear='getGoodsList'>
            <el-button slot='append' icon='el-icon-search' @click='getGoodsList'></el-button>
          </el-input>
        </el-col>
        <el-col :span='4'>
          <el-button type='primary' @click='goAddPage'>添加商品</el-button>
        </el-col>
      </el-row>

      <!-- 表格区域 -->
      <el-table :data='goodsList' border stripe>
        <el-table-column label='#' type='index'></el-table-column>
        <el-table-column label='商品名称' prop='goods_name'></el-table-column>
        <el-table-column label='商品价格(元)' prop='goods_price' width='95px'></el-table-column>
        <el-table-column label='商品重量' prop='goods_weight' width='95px'></el-table-column>
        <el-table-column label='创建时间' prop='add_time' width='140px'>
          <template slot-scope='scope'>
            {{ scope.row.add_time | dateFormat }}
          </template>
        </el-table-column>
        <el-table-column label='操作' width='125px'>
          <template slot-scope='scope'>
            <el-button size='mini' type='primary' icon='el-icon-edit'></el-button>
            <el-button size='mini' type='danger' icon='el-icon-delete'
                       @click='removeGoods(scope.row.goods_id)'></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页 -->
      <el-pagination @size-change='handleSizeChange' @current-change='handleCurrentChange'
                     :current-page='queryInfo.pagenum' :page-sizes='[3, 5, 10, 15]' :page-size='queryInfo.pagesize'
                     layout='total, sizes, prev, pager, next, jumper' :total='total'>
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  name: 'List',
  data() {
    return {
      // 查询参数
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 保存商品列表信息
      goodsList: [],
      // 总数据条数
      total: 0
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    async getGoodsList() {
      //   根据分页获取对应的商品列表
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })

      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      console.log(res.data)
      this.$message.success('获取商品列表成功')
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      // 当页号发生改变时，更改pagesize，重新请求
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    handleCurrentChange(newPage) {
      // 当页码发生改变时，更改pagesize，重新请求
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 事件函数代码编写
    async removeGoods(goodsId) {
      // 根据id删除对应的参数或属性
      // 弹窗提示用户是否要删除
      const confirmResult = await this.$confirm(
        '请问是否要删除该商品',
        '删除提示',
        {
          confirmButtonText: '确认删除',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 如果用户点击确认，则confirmResult 为'confirm'
      // 如果用户点击取消, 则confirmResult获取的就是catch的错误消息'cancel'
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }

      // 没有取消就是要删除，发送请求完成删除
      const { data: res } = await this.$http.delete(`goods/${goodsId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除商品失败')
      }

      this.$message.success('删除商品成功')
      this.getGoodsList()
    },
    goAddPage() {
      this.$router.push({ path: '/goods/add' })
    }
  }
}
</script>

<style lang='less' scoped>

</style>
